Rigid-frame double-cranking motor grader



April 28, 1931. F. s. DAVIS ET AL I RIGID FRAME DOUBLE CRANKING'MOTORGRADER Filed Oct. 29, 1 926 2 Sheets-Sheet 1 April 28, 1931. F, V ET L1,803,099

RIGID FRAME DOUBLE GRANKING MOTOR GRADER Filed Oct. 29, 1926 2Sheets-Sheet 2 Y n I'm 7 Illll Z I 75 Eli. 3 .94- l g g-l 76 3d] -1- 70fig fl 56 J J 7 76 M672 39 io /05 4 U Jcwafi Patented Apr. 28, 1931FRANKDAVIJIES, eta-swede; mbftabmab s. tenn s, or newer, 111mm, its; sonons ronus'rm MANUEACTUBI oo or cnroneo rmnvors, A oortroRAjrIo'Nmeme?eemem m ao'mwma I i f 6 -Th1s-1nvent1on -relates-to motor 'graders,;-F1gure;3-1s airontview ofthe engine taken especially-those ofthe nowmoreorless familiar one-man manipulatabletype-inwhich the engine Or-power plant is so rigidly attached to the grader framemechanismrthatthe engine and the frame:coop-eratin'gly'assist eachother. A

The objects of the invention are to provide anim'proved form of securingthe* engi-ne rigidly to the frame and wforconventionall-y cranking theengine WhensoseCur'ed, the cranking mechanism 'including means by whichcranking may be effectively performed fromeitherside-of the device.

The first above mentioned object is more particularly to soconnect'thefront end of the tractor with the main frame or side rails ofthe'grader thattheobjectionable lateral rocking of the framerel'ati'veto-the: tractor is eliminated," and in this connection it is Worthy ofnote thatinrmac'hines of'the' one man type utilizinga tractoras thepropelling means;- there is, generally speaking; no" advantage takenofthe rigidity of: the tractor body to strengthen and stabilizethe-grader frame a gainst twists caused: by u'nequal thrust appliedthrough such membe'rs 'as '20; here illustrated; This thrust whenseverely *applied at the end of-su'ch-"cranklarm as here illustratedby'21 causes 'a teIidency-Of'the frame to sway sideways; which"issuccessfully resisted by 'thepresent invention- The invention:consists in -means carrying "out theforegoing and otherobj-ects, whichcan beeasily and cheaply madefwhichis highly efficientand.notreadilyyliableito get out of order. a

'. More particularly the inventionnconsists 1n numerous features and:details-of construction hereafter morefully set forth inthespecification and claims:

- j Referring to the drawings in which-like numerals designate the samepart's' throughout the several Views?" j Figure 1 is a side elevation ofmechanism illustrating this'invention in its preferred formh" Figure 2is aside detail 'view of the crank ing mechanism takenon the line 2'2ofFigure i on approximately the :line 3+3 of;Figure 1.

Ian line 44'of;Figure3.' r

The invention is shown applied to wheels "-10,; front wheels" 12 andconnecting F1guref4 is a plan-detailzview of the irregus I 1 J grader oficonvention'al form including rear frame 14, 'carrying? intermediatebetween the 1 .wheels *the road working tool 16 below'sup- :plemental-sframeal8, adjustable through inanipulatable by handcwheels 24 inconventional manner. i

. This --tool*16 is alsoi further adjustable in' conventional mannerbythe.=.mechanism crank shaftrmechanism 20 2 l :22 and 23 2628 adjustableby the hand wheel 30. I The i shaft ,38 on-which rear wheels 10 aremount- I ed. 1 l he engine 36 also includes main shaft -40l42--whi'chhasnto be initially rotated or zcranked by mechanism of this invention.The front or crankable end ofthis shaft; lies with-- oftheipower-plantcase 'ina suitable case 44 constituting the front end Oneof the problemsof this invention-is to secure the forward end of the power plantrigidlyto-the frame 14 iof-the tractor. In the preferred embodiment ofthe invention, this is accomplished by suspending the forward end 46 ina U- shaped;gframe 48 rigidly secured: to frame 14 by any suitablemeansv as for instance rivets orbolts 50,.the engine case .44 being'jrigidly secured to said ,U-shaped f'rame 48 th'roughmechanismto bedescribed.

.The device includes'achannel shaped horizontally idisposedcasting 52 ofsuch size and shape-that it enters and tightly fits the fchan-'nelshapedsection oft-he u-shaped frame 48 asclearly shown in Figure 2,being rigidly secured in place by a multiplicity of bolts 54 placedatpoints some distance apart along .the bottom oft member 48,-the heads 56of the bolts54 being within hollow interior 58 of the casting 52. Themember 52 is in turn secured to the bottomwof c-ase44 by amultiplicityofsuitably disposed boltslfiO. The

forward end 46 of the engine mechanism 36 is further secured to theU-frame 48 by heavy bracket member 62 located Well down on the frame 48,secured to said frame by bolts 64 and to the engine by bolts or lagscrews 66. The result of the foregoing is that the forward end of theengine is rigidly held in the frame 48 under all. conditions of strainupon thedevice- V.

' The U-shaped'frame 48 justdescribe'dextends so far beyond the sides ofthe engine 36 and is longitudinal of the machine so close to crankingend 40 of the drive shaft 40-42- that special means has to be providedaccessible from the side of the machine for effect ing cranking of theshaft end 40 and it is preferablydesirable to provide means for socranking the shaft and consequently the engine from either side of thegrader as the will of the operator'may dictate. Afurther importantreason for the double cranking dev ce is the fact that it is not alwayspossible because of the diagonal position of the bladeto apply a crankat a certain side of the machine. For instance, sometimes the motor isoverloaded and dies with the blade dee'p'in theground andpracticallyimmovabl'e diagonally. This invention includes mechanismwhich will now be described which overcomes the above difficulties. i

Slidably mounted through the 'wall of case '46 and in alignment withshaft end 40 is" a short shaft 68. Thisshaft carries a spline reciprocalthrough a beveled gear 72' jo ur'-' 'nale'd in' a suitable bearingcasting 74 on the end of case 44 whereby rotation of said bevel gear? 2rotates shaft 68 in all positions of its longitudinal jmovemnt throughthe end of case 44. Shaft 68 is reciprocal through the agency fof ashort lever 7 6 rigid on shafese journaled in stationary bearing 78,thie lower end of the crank being'operatively attached to the shaft 68in a conventionalmechanism 80, permitting the lever 76-as it rocks in aclockwise direction, as viewed in Figure 2, to move shaft '68jto theleft until 'a'con'ventional chuck 82 on itsleft hand -end engages shaft'end'40 and pin 84 thereon, the pin'slipping 'into'the notch 84 inthechuck in conventional fore referred to,"which, as clearly shownin Figure'3. extends a substantial distance toward eachside ofthe machine, therebeing providedfupwardly turned handle ends 88 and 90, selectivelygraspable byan operator on either side of the machine, as the case maybe, ;to manually rock said shaft 86 and thus in the mannerdescribedeffect operative connection'o'r disconnection, as the casemaybe,

between the clutch orchuck 82 and the shaft end 40.

' {Beveled gear '2 2, heretofore referred to, is

bevel gears 92 and 94 each mounted on its independent shaft 96 and 98,respectively, suitably journaled in the frame 78 Which, as shown in planview in Figure 4, entirely surrounds thegear mechanism 72, 92+94. Eachof these shafts, as clearly shown in Figure 4 extend outside the frame14'and are there eIlgageable by ordinary cranks applied to the "pins 100for rotation to effect cranking of the tractor engine. Obviously, whenthe operator rotates one shaft 96, the other shaft 98 will idlyrotate,and vice versa, but

this is unobjectionable.

By the construction described, we have rigidly secured the engine in theframe mechanism of the tractor and have provided readily accessiblecranking means operable from 'ei'therside of the tractor.

The -shaft 68 is frictionally held in either position to which it movesin the operation of 'cranl'ring shaft 40 through the agency of avertically movable ball 102 urged by a spring 104 into either one of'twonotches 106 and 108' adjacent to the end of shaft 68, the ball andspring being confined and vertically movable in asuitably provided case110 on the extreme; outer end of frame 78.

It is obvious that should occasion occur, two operators on oppositesides of the machine may simultaneously operate the shafts 96 and 98 toeffect cranking of theengine.

The rigidity of connection between U frame 48 and side frame'l4 makes itpossibleto effectively'journal shafts 96 and 98 on brackets 114-tothereby obtain steady supports for said shafts 9'6 and 98 withconsequent efficient cranking of the main engine shaft.

Havingthus described our invention, what we claim as new-and desire-tosecure by Letters Patent is lfIncombin-ation with a tractor engine caseand side frame member extending longitudinally thereof, on oppositesides thereof,

"a U-shaped frame embracing the case, means rigidly securingtheends ofthe U frame to the side frame, means rigidly bracing the engine to the Uframe near the base of the U frame and means rigidly securing the engineto the base'of the U frame at a'multiplicity of points alonfg-said base,said last mentioned mechanism including a supplemental casting ofchannel shape, interposed between the engine caseand U frame 'andboltedto each, the

-selectively drivable by either one of two ing crosswise of the sideframe supported intermediate its ends to the U frame, means operativelyconnecting said shaft to the shaft to be cranked and manually operablemeans for rotating the second shaft to crank the first shaft.

In Witness whereof, We have hereunto subscribed our names.

FRANK S. DAVIS. LEONARD S. BURNS.

